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Classifying Matter: Elements, Compounds, and Mixtures

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Classifying Matter: Elements, Compounds, and Mixtures Element, Compound, or Mixture? Silver Element, Compound, or Mixture? Sand Pure Substances A sample of matter ... – PowerPoint PPT presentation

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Title: Classifying Matter: Elements, Compounds, and Mixtures


1
Classifying Matter Elements, Compounds, and
Mixtures
2
Pure Substances
  • A sample of matter that has definite chemical and
    physical properties.

Atoms
Elements
Compounds
Molecules
3
Elements
  • pure substance that cannot be separated into
    simpler substance by physical or chemical means.

4
Compounds
  • Pure substance composed of two or more different
    elements joined by chemical bonds.
  • Made of elements in a specific ratio
  • that is always the same
  • Has a chemical formula
  • Can only be separated by
  • chemical means, not physically

H2O
NaCl
CO2
5
Mixtures
  • A combination of two or more pure substances that
    are not chemically combined.
  • substances held together by physical forces, not
    chemical
  • No chemical change takes place
  • Each item retains its properties
  • in the mixture
  • They can be separated physically

Chem4kids.com
6
Mixtures vs. Compounds
7
Can you identify the following?
  • You will be shown a series of photos. Tell if
    each photo represents an item composed of an
    element, compound, or mixture.
  • Review
  • An element contains just one type of atom.
  • A compound contains two or more different atoms
    joined together.
  • A mixture contains two or more different
    substances that are only physically joined
    together, not chemically.
  • A mixture can contain both elements and
    compounds.

8
Element, Compound, or Mixture?
  • Rocks

9
Element, Compound, or Mixture?
  • Copper

10
Element, Compound, or Mixture?
  • Jelly Beans

11
Element, Compound, or Mixture?
  • Table Sugar (C12H22O11)

12
Element, Compound, or Mixture?
  • Diamond (C)

13
Element, Compound, or Mixture?
  • Tea

14
Element, Compound, or Mixture?
  • Salt (NaCl)

15
Element, Compound, or Mixture?
  • Neon Gas (Ne)

16
Element, Compound, or Mixture?
  • Salad

17
Element, Compound, or Mixture?
  • Pure Water (H2O)

18
Element, Compound, or Mixture?
  • Aluminum (Al)

19
Element, Compound, or Mixture?
  • Fresh-Squeezed Lemonade SLemonade

20
Element, Compound, or Mixture?
  • Silver (Ag)

21
Element, Compound, or Mixture?
  • Sand

22
Element, Compound, or Mixture?
  • Rocks

23
Element, Compound, or Mixture?
  • Copper

Cu
24
Element, Compound, or Mixture?
  • Jelly Beans

25
Element, Compound, or Mixture?
  • Table Sugar

C12H22O11
26
Element, Compound, or Mixture?
  • Diamond

C
27
Element, Compound, or Mixture?
  • Tea

28
Element, Compound, or Mixture?
NaCl
  • Salt

29
Element, Compound, or Mixture?
Ne
  • Neon Gas

30
Element, Compound, or Mixture?
  • Salad

31
Element, Compound, or Mixture?
  • Pure Water

H2O
32
Element, Compound, or Mixture?
  • Aluminum

Al
33
Element, Compound, or Mixture?
  • Lemonade

34
Element, Compound, or Mixture?
  • Silver

Ag
35
Element, Compound, or Mixture?
  • Sand

36
(No Transcript)
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